boll

n seed-case of the cotton plant or flax （棉或亚麻的）圆荚.

bogie, bogus, bogy (also bogey), bohemian, boil, boiled, boiled sweet, boiler, boiler suit, boiling, boiling hot, boiling-point, boisterous, boisterously, boisterousness, bold, boldly, boldness, bole, bolero, boll-weevil, bollard, bollocks, boloney (also baloney), Bolshevik, Bolshevism, Bolshevist, bolshie (also bolshy), bolster, bolt, bolt-hole, bomb, bomb out, bomb-bay, bomb-disposal, bomb-proof, bomb-sight, bomb-site, bombard, bombardier,